Add Icon

Summary: The first four were added when I ran `yarn start` from `master`. The last one was added when I logged out.

Reviewed By: mweststrate

Differential Revision: D19346191

fbshipit-source-id: 6025bf9b0b2667f93858450cb73e81a6b50126f0

static/icons.json

@@ -300,5 +300,20 @@
   ],
   "messenger-code": [
     12
+  ],
+  "book": [
+    12
+  ],
+  "list-arrow-up": [
+    12
+  ],
+  "cat": [
+    12
+  ],
+  "duplicate": [
+    12
+  ],
+  "profile-circle-outline": [
+    16
   ]
-}
+}